12 mos. & up. The Safety 1st Lift; Lock & Swing Gate has a unique 2-in-1 design which allows the gate to be used in either of two modes. you decide which mode best fits your needs: mount it at the top of the stairs as a hardware swing gate or place it in your doorway as a pressure mount security gate. Minimum length: 28 inches; Maximum length: 42 inches; Height: 26 inches.